HIGH DEFINITION OPTICS LENSES All Oakley lenses offer HDO Technology with the following benefits: Clarity: Conventional lenses can magnify images. HDO precision gives less distorted vision across the entire field of view. Refraction: With regular lenses, objects arent really where you see them. HDO offers a truer visual image so your brain wont have to work overtime. UV Protection: All Oakley lenses block 100% of UVA, UVB & UVC rays and harmful blue light up to 400 nm.